Frequently Asked Questions: ADU process

ADUs are Accessory Dwelling Units, sometimes called Additional Dwelling Units. ADUs can be attached or detached from a primary residence, and can be used for a variety of purposes, including living space for aging relatives, vacation rentals, private workspaces, and more.

To get a permit for an ADU, you must first know your local ADU regulations and then apply for a building permit. Thankfully, our crew at ADU Built Right are professionals at the ADU permitting process and will navigate it for you. Contact us to get started.

The ADU BuiltRight crew will review the building permit requirements for your lot and provide you with ADU options. After permitting, we will design your custom ADU and then submit the Site Plan. After Site Plan submission, we will create the architectural design, with all necessary drawings and engineering for quick approval. Our draftsman and engineer will provide you with a set of plans that can be approved for permit when you are ready.

We know that budget and having control over your ADU is important, so we will estimate any portion of the job you would like us to do.

If you prefer to build your own ADU, our team can get you through the permit process. Or, we can build your ADU to any stage you would like, from framing to finishing. Many homeowners choose to finish the interior themselves. Whatever your needs, ADU BuiltRight will customize your plan to accommodate.

• Number of ADUs: In urban growth areas, lots must allow at least two ADUs in addition to the primary residence. 
• Size: ADUs cannot be larger than 50% of the primary residence or 950 square feet, whichever is smaller. 
• Parking: Parking is not required for ADUs, but existing off-street parking spaces cannot be removed without replacing them elsewhere on the property. 
• Owner occupancy: The owner is not required to live on the property where the ADU is located.

Contact us for more information about ADU building and usage regulations. We are familiar with the requirements and can help you explore your options.

Click here for information regarding local laws.

Click here for more information regarding ADU laws in Washington State.

It's simple! Contact us, and we will set your plan in motion. We will navigate the permit requirements for your lot and provide you with options. Just tell us what you want and we'll help you achieve your dream ADU.

We primarily serve the areas of Centralia, Olympia and Tacoma, but will gladly assist in building ADUs in Chehalis, Tenino and Longview. Contact us to find out if we can serve you.